Proton's Lumo AI Adds Encrypted Canvas for Documents, Code and Interactive Web Pages

Proton has announced that Lumo, its privacy-first AI assistant, can now produce documents, code and interactive web pages in a dedicated canvas that sits alongside the chat. Users can ask Lumo to draft a report, write or review code, or build a working web page, then keep refining it in the same conversation. Every creation is stored with zero-access encryption, so Proton cannot read it, and Lumo does not log conversations or use them to train models.

For IoT and embedded engineering teams, the update addresses a growing tension. AI assistants are now part of daily work on firmware, device documentation and internal dashboards, yet that work often includes unreleased code, customer configurations and security-sensitive designs. Lumo's creations are designed so that this material stays under the user's control from the first draft to the final export.

A workspace beside the conversation

Until now, longer outputs such as reports or code lived inside chat replies, and several rounds of edits meant scrolling back to find the right version. The new canvas gives each piece of work its own view with the conversation alongside it. Lumo decides automatically whether a request calls for a chat answer or a creation, and users can switch this behaviour off per conversation or in Settings.

Key capabilities include:

• Targeted revisions. Users can highlight a passage of a document and describe the change, or select a block of code and choose Improve or Explain.

• Direct editing. Documents can be edited by hand with formatting controls or in Markdown source.

• Version history. Every Lumo revision and saved manual edit creates a new version that can be reviewed, copied, downloaded or saved to Proton Drive.

• Interactive previews. Web pages render as live previews, useful for prototyping simple tools or dashboards.

• A Creations library. All creations can be found across conversations from Library → Creations.

Built so the provider cannot read the work

Proton says privacy shaped the engineering decisions behind the feature. To make the Creations library work without its servers reading conversations, Lumo stores a separate encrypted copy of each creation's latest version, which only the user's device can decrypt.

Export follows the same principle. Conversion to Word happens locally on the user's device, and PDF downloads go through the browser's print dialog. Proton says it chose not to generate PDFs on a server, because that would have meant sending unencrypted content to another backend. The company notes one trade-off: PDFs saved directly to Drive are currently image-based, without selectable text.

What it means for connected-device teams

IoT work produces exactly the kind of material that teams hesitate to hand to a general-purpose AI service. Creations open up several practical uses where confidentiality matters:

• Firmware and code review. Engineers can paste a driver, a parser or an over-the-air update routine into the canvas, select a section and ask Lumo to explain or improve it. Each revision is kept as a separate version, so a reviewer can compare suggestions before anything reaches the codebase.

• Device and integration documentation. Installation guides, API notes for a gateway or a field technician's checklist can be drafted, edited by hand and exported to Word on the user's own device.

• Quick dashboard and tool prototypes. Because web pages render as interactive previews, teams can sketch a simple telemetry view or configuration helper to test an idea before committing engineering time.

• Compliance and security write-ups. Drafts of incident summaries, vulnerability disclosures or internal security policies often contain details that should not leave the organization. Keeping these drafts in encrypted storage that the provider cannot read reduces one source of exposure.

In each case, the content of the creation, its earlier versions and the conversation that produced it are covered by the same zero-access encryption as the rest of a user's Lumo history. Proton states that it does not use this material to train AI models.

Availability

Creations are available now to all Lumo users. Proton says support for presentations is in development. Full details are in Proton's announcement, Lumo can now turn your ideas into creations.

About Proton

Proton is a Swiss technology company founded by scientists, building privacy-first products including Proton Mail, Proton VPN, Proton Drive, Proton Pass and the Lumo AI assistant. Its services use end-to-end and zero-access encryption, are based in Europe and are backed by the nonprofit Proton Foundation.